The Omni Hybrid AR-15 Pistol from ATI features the Omni Hybrid polymer lower receiver made of a fiberglass-composite polymer over a zinc metal insert which is lighter than most aluminum lowers, yet has the strength or more of a steel body lower. Designed to give extra strength in the high-pressure sections, the Omni Hybrid surpasses military pressure and weight-bearing testing. This AR-15 Pistol has a 7" barrel with a 7" free-floating quad rail, and a 7" buffer tube for a 23" overall length. The Omni Hybrid AR-15 Pistol is optics-ready and comes with a 30-round PMag.